Who should keep the toys?

Tonight after Hong Zheng played his blocks, i asked him to keep away the toys but he refused as he was feeling tired. I insisted him to keep so i was trying to pursue him. Below was the conversation.

Mum : Who played the toys?
HZ: Hong Zheng
Mum: Who should keep the toys?
HZ: No!
Mum: Who is the "No" in our house?
HZ: An An brother keeps (my sister's son)
Mum: An An is not at our house, how to help you to keep?
HZ: An An go home!
Mum: SO, who should keep the toys?
HZ: Froggy (his frog toy just sitting next to us)
Mum: Can Froggy helps?
HZ: No!

Unfortunately i still failed to pursue him to clean up. The most effect way was: " Go and keep your toys now!"